[clang] [CIR] Add the ability to detect if SwitchOp covers all the cases (PR #171246)

[Andy Kaylor via cfe-commits]

================
@@ -1105,6 +1105,8 @@ mlir::LogicalResult CIRGenFunction::emitSwitchStmt(const 
clang::SwitchStmt &s) {
     terminateBody(builder, caseOp.getCaseRegion(), caseOp.getLoc());
   terminateBody(builder, swop.getBody(), swop.getLoc());
 
+  swop.setAllEnumCasesCovered(s.isAllEnumCasesCovered());
----------------
andykaylor wrote:

Can you add a test case to `clang/test/CIR/CodeGen/switch.cpp` where this is 
true?

https://github.com/llvm/llvm-project/pull/171246
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